Confidence votes 5. Well the cleanest bug in the world would most probably be a cockroach but dogs do have the cleanest mouths~!!! (=. 3 people found this useful.
Best Answer: The answer is 2. fault. That is the break in the crust. When the movement occurs, that is an earthquake. a locked discontinuity is a fault, if it moves you have an Earthquake. It is a fault. volcano. thats not my answer.
The movement of the plates is incredibly slow, but since the plates are so big, when they bump into and rub against each other, we get massive events like volcanoes and earthquakes. And along these plate boundaries, we find faults. Faults are cracks in the earth's crust where movement occurs on at least one side. So, in order for a crack in the ground to be a fault, one side or the other has to move, but sometimes both sides move, too!